文章基本信息

标题：Stranding of Pentagenia vittigera Following Flow Reductions in the Lower Missouri River
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作者：Patrick J. Braaten ; Christopher S. Guy
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：1997
卷号：12
期号：3
页码：493-494
DOI：10.1080/02705060.1997.9663560
出版社：Taylor & Francis
摘要：During a nine-day period in December 1995, water levels in the lower Missouri River declined 1.65 m as a direct result of upstream flow regulation for navigation. We observed numerous aquatic invertebrates, predominately Pentagenia vittigera, on a mud flat downstream from a wing dike in the lower Missouri River. The estimated number of P. vittigera stranded on this single mud flat was 6,400 individuals. Based on an analysis of December discharge and water levels from 1980-1994, it appears that the rate of water level declines and subsequent stranding of P. vittigera were rare events; nonetheless, rapid decreases in discharge associated with the transition between the navigation and non-navigation seasons can negatively impact P. vittigera.